<template>
    <div class="type-nav">
        <div class="container">
            <div @mouseenter="navIsEnter = true" @mouseleave="navIsEnter = false">
                <h2 class="all">全部商品分类</h2>

                <div class="sort" v-show="sortIsShow">
                    <div
                        @click="toSearch"
                        class="all-sort-list2"
                        @mouseenter="isLeave = false"
                        @mouseleave="containerMouseLeave"
                    >
                        <div
                            class="item"
                            :class="index === currentIndex ? 'active' : ''"
                            v-for="(one, index) in categoryList"
                            :key="one.categoryId"
                            @mouseenter="isMouseEnterThrottle(index)"
                        >
                            <h3>
                                <a :data-category1Id="one.categoryId" :data-categoryName="one.categoryName">
                                    {{ one.categoryName }}
                                </a>
                            </h3>
                            <div class="item-list clearfix">
                                <div class="subitem">
                                    <dl class="fore" v-for="two in one.categoryChild" :key="two.categoryId">
                                        <dt>
                                            <a :data-category2Id="two.categoryId" :data-categoryName="two.categoryName">
                                                {{ two.categoryName }}
                                            </a>
                                        </dt>
                                        <dd>
                                            <em v-for="three in two.categoryChild" :key="three.categoryId">
                                                <a
                                                    :data-category3Id="three.categoryId"
                                                    :data-categoryName="three.categoryName"
                                                >
                                                    {{ three.categoryName }}
                                                </a>
                                            </em>
                                        </dd>
                                    </dl>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
        </div>
    </div>
</template>

<script>
import { mapActions, mapState } from "vuex";
import { throttle } from "lodash";
export default {
    name: "TypeNav",
    data() {
        return {
            currentIndex: -1,
            isLeave: true,
            navIsEnter: false,
        };
    },
    methods: {
        ...mapActions("category", ["getCategoryList"]),
        isMouseEnter(index) {
            if (this.isLeave) return;
            this.currentIndex = index;
        },
        containerMouseLeave() {
            this.isLeave = true;
            this.currentIndex = -1;
        },
        isMouseEnterThrottle() {},

        toSearch(e) {
            // 1.将被点击元素的id和name用自定义属性记录
            // 2.在点击时获取id和name，用query参数传递

            // 获取id和name
            const {
                categoryname: categoryName,
                category1id: category1Id,
                category2id: category2Id,
                category3id: category3Id,
            } = e.target.dataset;
            // 判断如果不是a元素，就不进行路由跳转
            if (!categoryName) return;
            const params = this.$route.params;
            // 进行路由跳转
            this.$router.push({
                name: "search",
                query: {
                    categoryName,
                    category1Id,
                    category2Id,
                    category3Id,
                },
                params,
            });
        },
    },
    computed: {
        ...mapState("category", ["categoryList"]),
        sortIsShow() {
            // 判断是否为home页,如果是就返回true一直显示
            if (this.$route.name === "home") return true;
            // 如果不是home就看鼠标是否在nav内
            return this.navIsEnter;
        },
    },
    watch: {
        $route() {
            this.navIsEnter = false;
        },
    },
    mounted() {
        this.getCategoryList();
        this.isMouseEnterThrottle = throttle(this.isMouseEnter, 100);
    },
};
</script>

<style lang="less" scoped>
.type-nav {
    border-bottom: 2px solid #e1251b;

    .container {
        width: 1200px;
        margin: 0 auto;
        display: flex;
        position: relative;

        .all {
            width: 210px;
            height: 45px;
            background-color: #e1251b;
            line-height: 45px;
            text-align: center;
            color: #fff;
            font-size: 14px;
            font-weight: bold;
        }

        .nav {
            a {
                height: 45px;
                margin: 0 22px;
                line-height: 45px;
                font-size: 16px;
                color: #333;
            }
        }

        .sort {
            position: absolute;
            left: 0;
            top: 45px;
            width: 210px;
            height: 461px;
            position: absolute;
            background: #fafafa;
            z-index: 999;

            .all-sort-list2 {
                .item {
                    h3 {
                        line-height: 30px;
                        font-size: 14px;
                        font-weight: 400;
                        overflow: hidden;
                        padding: 0 20px;
                        margin: 0;

                        a {
                            color: #333;
                        }
                    }

                    .item-list {
                        display: none;
                        position: absolute;
                        width: 734px;
                        min-height: 460px;
                        background: #f7f7f7;
                        left: 210px;
                        border: 1px solid #ddd;
                        top: 0;
                        z-index: 9999 !important;

                        .subitem {
                            float: left;
                            width: 650px;
                            padding: 0 4px 0 8px;

                            dl {
                                border-top: 1px solid #eee;
                                padding: 6px 0;
                                overflow: hidden;
                                zoom: 1;

                                &.fore {
                                    border-top: 0;
                                }

                                dt {
                                    float: left;
                                    width: 54px;
                                    line-height: 22px;
                                    text-align: right;
                                    padding: 3px 6px 0 0;
                                    font-weight: 700;
                                }

                                dd {
                                    float: left;
                                    width: 415px;
                                    padding: 3px 0 0;
                                    overflow: hidden;

                                    em {
                                        float: left;
                                        height: 14px;
                                        line-height: 14px;
                                        padding: 0 8px;
                                        margin-top: 5px;
                                        border-left: 1px solid #ccc;
                                    }
                                }
                            }
                        }
                    }

                    &.active {
                        & > h3 {
                            background-color: yellowgreen;
                        }
                        .item-list {
                            display: block;
                        }
                    }
                }
            }
        }
    }
}
</style>
